Patent US3869219A successfully refreshed from Google Patents.
US3869219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill screw
Assignee: Individual
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Filing: 1973-10-29
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Granted: 1975-03-04
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Expires: 1993-10-29
Abstract
Abstract The invention provides a screw for use particularly in fastening ribbed sheeting - such as roof sheeting, and especially roof sheeting made of plastic material - to a support such as a purlin wherein the screw has means for forming an enlarged hole in the sheeting so as to permit relative movement between the sheeting and the support due to thermal expansion and contraction. The screw has a shank, a head at one end of the shank, screw threads on an intermediate part of the shank, and between the head and part at least of the screw threads at least one outwardly extending wing member operable to enlarge a hole previously formed in the sheeting to allow the screw-threaded part of the shank to be fitted therethrough. This screw is preferably a drill-point, thread-cutting screw and the wing means are adapted to form in the sheet an enlarged hole large enough to permit relative movement as between the sheet and the support due to thermal expansion and contraction of the members.
Inventors
- 👤 Robert Neil Wilson
- 👤 John James Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/0036; F16B25/0089; E; E04; E04D; E04D3/00; E04D3/36; E04D3/3605; E04D3/3606; F16B25/001; F16B25/0031; F16B25/0042; F16B25/0052; F16B25/0078; F16B25/10; F16B25/103; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4966; Y10T403/4974; Y10T403/71; Y10T403/7123; Y10T403/75; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/906
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
191 words
A drilling and reaming screw adapted to fasten a ribbed sheeting to a support surface, including a drilling tip, a threaded shank portion and a tool engaging head means, first reaming wings extending radially outwardly from the screw shank a predetermined radial extent and located between the threaded shank portion and the drilling tip, second reaming wings extending radially outwardly from the screw shank a predetermined radial extent greater than the radial extent of the first wings, said second reaming wings located between the head means and the threaded shank portion, an unthreaded shank portion extending between the second reaming wings and the head means, the radial extent of the first reaming wings being slightly greater than the crest diameter of the threaded shank portion and frangibly associated with the screw shank, whereby the screw will form a first hole in the ribbed sheeting of a size capable of providing vertical support for the shank while the drilling tip penetrates the support surface and whereby the second wings will thereafter enlarge the hole in the sheeting to permit relative movement between the sheeting and support due to thermal expansion and contraction.
Claim 2
Dependent Claim
191 words
A drilling and reaming screw adapted to fasten a ribbed sheeting to a support surface, including a drilling tip, a threaded shank portion and a tool engaging head means, first reaming wings extending radially outwardly from the screw shank a predetermined radial extent and located between the threaded shank portion and the drilling tip, second reaming wings extending radially outwardly from the screw shank a predetermined radial extent greater than the radial extent of the first wings, said second reaming wings located between the head means and the threaded shank portion, an unthreaded shank portion extending between the second reaming wings and the head means, the radial extent of the first reaming wings being slightly greater than the crest diameter of the threaded shank portion and frangibly associated with the screw shank, whereby the screw will form a first hole in the ribbed sheeting of a size capable of providing vertical support for the shank while the drilling tip penetrates the support surface and whereby the second wings will thereafter enlarge the hole in the sheeting to permit relative movement between the sheeting and support due to thermal expansion and contraction.
Claim 3
Dependent Claim
29 words
A drilling and reaming screw in accordance with claim 1, wherein each first and second reaming wings comprise a pair of diametrically opposed members pinch formed on the shank.
Claim 4
Dependent Claim
26 words
A drilling and reaming screw in accordance with claim 1, wherein the portions of the second wings adjacent the threaded shank portion include relieved cutting edges.
Claim 5
Dependent Claim
75 words
A drilling and reaming screw in accordance with claim 1, wherein the distance between the extremity of the threaded shank portion adjacent the first wings and the portion of the second wings nearest the threaded shank portion is less than the distance between the sheeting and support so that the second wings will ream a larger hole in the sheeting without being subject to influences such as the engagement of screw threads in the support.
Claim 6
Dependent Claim
259 words
A structure including a support member, ribbed sheet member mounted on the support member by means of a screw having a drilling tip, a threaded shank portion and a tool engaging head means, first reaming wings extending radially outwardly from the screw shank a predetermined radial extent and located between the threaded shank portion and the drilling tip, second reaming wings extending radially outwardly from the screw shank a predetermined radial extent greater than the radial extent of the first wings, said second reaming wings located between the head means and the threaded shank portion, an unthreaded shank portion extending between the second reaming wings and the head means, the radial extent of the first reaming wings being slightly greater than the crest diameter of the threaded shank portion and frangibly associated with the screw shank, the distance between the extremity of the threaded shank portion which is adjacent the first reaming wings and the portions of the second wings nearest the threaded shank portion being less than the distance between the ribbed sheet member and the support member, whereby the screw will form a first hole in the ribbed sheeting of a size capable of providing vertical support for the shank while the drilling tip penetrates the support surface and whereby the second wings will thereafter enlarge the hole in the sheeting to permit relative movement between the sheeting and support due to thermal expansion and contraction, the second wings capable of reaming the larger hole without influence of thread engagement between the threaded portion and the support.
Claim 7
Dependent Claim
259 words
A structure including a support member, ribbed sheet member mounted on the support member by means of a screw having a drilling tip, a threaded shank portion and a tool engaging head means, first reaming wings extending radially outwardly from the screw shank a predetermined radial extent and located between the threaded shank portion and the drilling tip, second reaming wings extending radially outwardly from the screw shank a predetermined radial extent greater than the radial extent of the first wings, said second reaming wings located between the head means and the threaded shank portion, an unthreaded shank portion extending between the second reaming wings and the head means, the radial extent of the first reaming wings being slightly greater than the crest diameter of the threaded shank portion and frangibly associated with the screw shank, the distance between the extremity of the threaded shank portion which is adjacent the first reaming wings and the portions of the second wings nearest the threaded shank portion being less than the distance between the ribbed sheet member and the support member, whereby the screw will form a first hole in the ribbed sheeting of a size capable of providing vertical support for the shank while the drilling tip penetrates the support surface and whereby the second wings will thereafter enlarge the hole in the sheeting to permit relative movement between the sheeting and support due to thermal expansion and contraction, the second wings capable of reaming the larger hole without influence of thread engagement between the threaded portion and the support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |